MAKEDBM(8) — MAINTENANCE COMMANDS

NAME

makedbm − make a Yellow Pages dbm file

SYNOPSIS

makedbm [ −b ] [ −l ] [ −s ] [ −i yp_input_file ] [ −o yp_output_name ] [ −d yp_domain_name ]

[ −m yp_master_name ] infile outfile

makedbm [ −u dbmfilename ]

DESCRIPTION

makedbm takes infile and converts it to a pair of files in ndbm(3) format, namely outfile.pag and outfile.dir. Each line of the input file is converted to a single dbm record. All characters up to the first TAB or SPACE form the key, and the rest of the line is the data. If a line ends with ‘\’, then the data for that record is continued on to the next line. It is left for the clients of the Yellow Pages to interpret #; makedbm does not itself treat it as a comment character. infile can be ‘−’, in which case the standard input is read.

makedbm is meant to be used in generating dbm files for the Yellow Pages, and it generates a special entry with the key yp_last_modified, which is the date of infile (or the current time, if infile is ‘−’).

OPTIONS

−b Interdomain. Propagate a map to all servers using the interdomain name server named(8C).

−l Lowercase. Convert the keys of the given map to lower case, so that host name matches, for example, can work independent of upper or lower case distinctions.

−s Secure map. Accept connections from secure YP networks only.

−i yp_input_file
Create a special entry with the key yp_input_file.

−o yp_output_name
Create a special entry with the key yp_output_name.

−d yp_domain_name
Create a special entry with the key yp_domain_name.

−m yp_master_name
Create a special entry with the key yp_master_name. If no master host name is specified, yp_master_name will be set to the local host name.

−u dbmfilename
Undo a dbm file. That is, print out a dbm file one entry per line, with a single space separating keys from values.

EXAMPLE

It is easy to write shell scripts to convert standard files such as /etc/passwd to the key value form used by makedbm. For example:

#!/bin/awk -f
BEGIN { FS = ":"; OFS = "\t"; }
{ print $1, $0 }

takes the /etc/passwd file and converts it to a form that can be read by makedbm to make the Yellow Pages file passwd.byname. That is, the key is a username, and the value is the remaining line in the /etc/passwd file.

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